For hoz check the 330 ohm on the 9-57 board.
Use a 1W film. This is the same as on the 9-90
in upright chassis 25EC45 etc, very common.
For control pull out the white sleeve over the shaft
center control then center the sleeve. Almost all
Zeniths have this in one form or another.
73 Zeno
LFOD !